Paper-bag machine.



W. C. FULLER.

PAPER BAG MACHINE. APPLIoATloN FILED JAN. 2a, 1908.

943,534. Patented Dec.14,1909.

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@l k? Jhr/agg@ W. C. FULLER. PAPER .BAG MACHINE.

rPLIoATIoN FILED JAN. 2a, 190s.

943,534. Patented Dec. 14, 1909.

5 SHEETS-SHEET 2.

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W. G. FULLER.

PAPER BAG MACHINE. APPLICATION FILED JAN. z3, 190e.

Patented De@.14,1909.

5 SHEBTS-SHEET a'.

r W. C. FULLER.

PAPER BAG MACHINE. APPLIoATIoN FILED JAN. 2a, 190s.

Patented Dec. 14, 1909.

5 SHEETS-SHEET 4.

' W. 0. FULLER.

PAPER BAG MACHINE. APPLICATION FILED JAN.'23, 190s.

Patented Dec. 14, 1909.

5 SHEETS-SHEET 5.

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UNITED STATES PATENT OFFICE.

WILLIAM C. FULLER, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO UNION PAPER BAG MACHINE COMPANY, 0F PHILADELPHIA, PENNSYLVANIA, A CCRPORATIGN 0F PENNSYLVANIA.

` PAPER-BAG MACHINE.

Specification of Letters Patent. Patented Dec. 14, 1909.

Applieationled January 23, 1908. Serial No. 412,315.

= forming paper bags, and consists of certain improvements in 4that class of machines known as rotary 'cylinder,machines; my present improvements relating to the bottom forming and pasting mechanism whereby bags are made from a previously folded paper tube.

The bottom forming and pasting mechanism comprising the subject of my invention is arranged to be connected directly withtube forming mechanism, or, if desired, tubes made in any way and of proper size and shape may be fed to my improved bot- -tom folding and pasting mechanism.

My invention is fully shown in the accompanying drawings, in which:

Figure 1, is a side elevation of the'bottom forming and pasting mechanism forming the subject of my invention; Fig. 2, is a plan view of the same; Fig. 3, is an enlarged plan View of the cylinder carrying the bottom forming mechanism; Fig. 4, is an end eleva tion of said cylinder; Fig. 5, is a perspective view of one set of the folding wings; Fig. 6, is a sectional view of the same on the line ca -a, Fig. 5; Fig. 7, is an elevation' of the folding wings on an enlarged scale, showing the movable wings in the position they assume when thrown over to fold the bottom of the blank; Fig. 8, is a perspective view of one set of the gripping fingers; Fig. 9, is a. perspective view of the blank cutting and slitting rolls; showing the means for guiding and opening the side folds of the bag blank; Fig. 10, is opening guide for the side folds of the bag blank; Figs. 11, 12, 13, 14 and 15, are perspective views illustrating the successive stages of forming the bottomsof the bag;

Fig. 16, 1s a sectional view of the blank cutting roll; Figs. v17 and 18, are perspective rolls for holding and` guiding the blanks as they leave the slit-ting rolls; Fig. 19," is a sectional view of a detail of my invention; Figs. 20 and 21,are sectional viewsfof the a perspective view of the latter in section, of the tension rolls employed to crease and fold over the bottom of the bag and cause it to be held together by the paste, and Fig. 92, is a perspective view of one of the bottom creasing blades.

The object of my invention is to simplify the mechanism for forming what are familiarly known as satchel bottombags that is to say, bags made from tubular blanks having bellowsfolded sides, the 'ends of which blanks are afterward folded and creased in diamond form and then pasted down to form the bot-tom. 4

The mechanism forming the subject of my invention is mounted on a suitable supporting frame 1 in which is journaled the main driving shaft 2, to which motion may be imparted by any suitable means (not shown). A counter shaft 3 is driven from the shaft Q, by means of the gears 4 and 5, and asecond counter shaft 6, is'driven from the shaft 3 by means of the gears 7 and 8. A set of feed rolls 9 and 10; cutting rolls 11 and 12, and slitting rolls 13 and 14, `which latter rolls serve also to feed the blanks, are driven from the counter shaft 3, by means of the train of meshing gears 15 and 16; 17 and 1S; 19 and 20, and the intermediate gears Q1 vand 22, mot-ion 4being imparted tto such train by the gear wheel 23 mounted on the shaft A flattened tube of bellows-folded paper 25, is entered first between the feed rolls 9 and 10, disposed at the right-hand side 'of vthe mechanism shown in Fig. 1, passes thence to the cutting rolls 11 and 12, where a knife blade 26 carried by the roll 11 severs itI into blanks which are passed to the other pair of feed rolls 13 and 14; the roll 13 being provided with slitting blades 2T foiI a purpose to be described hereinafter, and from these rolls it passes to a drum or cylinder 30, provided with a. series of mechanisms to, grip the forward end of the blanks, and hold the same for operation by the several mechanisms designed to fold the end forming the bottom of the bag. The circumference of the cutting rolls equals the distance between the center of said rolls and the center of the feed rollsl and 14, so that the sections of tube will have been caught by said latter rolls ready to be passed forward to the gripping mechanism carried by the cylinder 30 simultaneously'with the severing of said 31 carried by said rolls at the edges of the same, and which are so arranged as to release the blank as soon as' it. is engaged by the grippin mechanism carried by the cylinder 30. s the blank passes between the cuttin rolls 11 and 12, guides 32 having .thin-b aded forward ends 33 enterthe side folds of the blank, and these guides insure the-feeding of the same in the proper line to said gripping mechanism. As. the blank emerges from between the feed rolls 13 and 14, its folded'sidesare spread bythe enlarged portion 34 ofsaid guides 32 in order that the folding wingsA may freely enter said sides with 'the folds disposed in the roper manner with relation to such wings.

uring the movement of the blank' in\contact wlththe opening guides, it is held in proper alinement by tension rolls 35, mounted on the ends of a spindle 36, which is jourvnaled in the end 37 of a bracket arm .38

pivotallymounted at 39 and supported by a spring 40. The spindle is capable of vertical movement in the end of the bracket, ,the latter being slotted at 41 for they purpose,

-and `pillow blocks 42 in contact with' the spindle and supported Aby springs 43 are provided to insure a yielding tension to saidp "rolls 35. These rolls hold the blank in contact with the guides 32 'while the folding mechanism, in combination with thel grip-A l ping mechanism carried by the cylinder 30, 40

etl'ectjthe fol-ds and creases necessary to form the bottom of the bag, after which said rolls are released from engagement with the blank as the folding mechanism is vwithdrawn;vssaid gripping mechanism carrying the blank forward until released at the proper point. To effect this result, I provide a cam 44 mounted' on the main driving sha-ft 3, said cam havinga flange 45 in engagement with a stud 46 on the bracket arm 38 which serves to lower the same at proper intervals to permit'the release of the rolls 35.A

' The cylinder 30 carries a series of mechanisms, inthe present instance three, ,for creasing and folding the end of the blafnk .and preparing the same to be finally pasted down to form the Satchel bottom of the bag.

' It will be unnecessary to describe more than Ainder 30, 1s a cam 50 internally disposed one of these mechanisms, however, as the others are duplicates of the saine` `On the shaft 6 carrying' the drum or cylwith respect to said cylinder. Carried by this drum or cylinder are sets of gripping fingers 51 arranged in pairs, there being three sets. These fingers are mounted upon pins 52 journaled in side extensions carried by arms 54, and such pins carr projections 55 connected by a spring 56 w iereby the fingers may be held in the outwardly extended position. The arms 54 are journaled on spindles 57 and are capable of movement thereon to move the fingers 51 toward or away from thersurface of the cylinder 30. These fingers are held in lengagement with the cylinder by means of a torsion spring 58, having one'end connected to the arm 54 and the other end connected .to the spindle 57, and their outward movement is accomplished' by the cani 50 .which engages studs 59 carried by thear1ns'54. The fingers 5l are heldin position slightly above the surface of the cylinder by the surface G0 of said cam until the forward edge of the underply of the Ablank is passed under the same when the stud 59' passes onto the low surface G1 of saidl cam and thespring 58 acts to clamp said fingers to said cylinder to engage and hold said blank.l The cylinder is cut out at G2 to accommodate the gripping fingers; the eut out portion providing shoulders 63.\ Vvrhen said gripping iingersare clamped to the cylinder, these shoulders 63 are lengaged by side projections G4 of said ii'igers, locking the latter while they are holding the blanks. The low surface G1 of said cam permits the spring 53 to maintain the gripping fingers in the closed positionlin Contact withl the blank for a period v of time sufficient to turn in the sides of. said blank and form the necessary creases or folds which are afterward pasted down and form the bottom of the bag'. This cam is also provided with a high side 65, which engages the studs 59 to throw said clamping fingers into the' position shown at ai, F ig. 4, when the blank is to be released from vthe cylinder. The cylinder 30 is so geared to the driving mechanism, as to have, as before described, a speed slightly greater than the feed rolls 13 and 14, so as to quickly draw away each blank presented by said rolls,l thereby providing suflicieiit space between the several blanks for the proper manipulation of the bot-tom forming mechanisms.

Disposed on oppositesides of the cylinder 30 and carried into and out of the Aoperative osition by cam guides 66 formed in a cylinder 67 fixed inposition over the shaft (i, are the folding wings *38 and 68a, of which there are three sets, (only one of which will be described), carried by supporting members (S9 which are adapted to slide in ways 70 mounted on the cylinder 3G. The wing G8a is fixed to tliein'einbeio While the wing G8 is mova'ble'with relation thereto; said wing being carried by a stud'l journaledin the niember 59, around which it is swungin the arc of a circle when actuated by suitable mechapism provided for the purpose. In addi-' tion, an auxiliary wing 72 is provided, car- Kvide a-pin 75, carried ried by a sleeve or bushing 73 mounted on the stud 71, said wing overlying and movable with the wing 68. The auxiliary wing 72 is held in contact with .the wing 68 by means of a torsion spring 74 surrounding the bushing 7 3; being connected at one end to the member 69 and at the opposite end to said bushing, such spring having a constant tendency to keep the wings 68 and 72 in the forward position, or that shown in Figs. 3, 4 and 5: Preparatory to their engagement with the side folds .of the blanks as the latter are passed onto the cylinder 30, it is necessaryto separate the wing 68 from theauX- iliary Wing 72, and ffor this purpose I pro# by the member'69'bac'k of the wing 68 and underlying the wing 72. The stud-71 carrying said wing 68 is suitably journaled in the member 69, and has a pinion V7 6 at its outer end engaged'by a gearsegment 77, carried iby a bell-crank lever 78,

pivoted at 79 to the member 69; the opposite end of said bell-crank carrying a roller 80. To effect the separation of the wings, I provide a cam 81 mounted on-the end'of the cylinder' 67 in 'such position as to engage said roller 80, causing it to pass under said cam and eeet amovement of the segment '7 7 in .the direction of the arrow Fig. 4; rocking the wngGS away from thewing 72 while' the 4latter is supported bythe pin 75. As

. .another cam ,soon as the cam ,81 releases theV roller 80, the

'wings 68 and 7 2 close on the upper side fold of the blank, and as the cylinder continues its movement, said roller 80 is engaged by l 82 mounted on the periphery of the cylinder 67, which cam imparts move-v -inent to the segment 77 in the opposite direction. This `movement amounts to' a halfrevolutioniof the pinion'76, and .is sufficient to throw the folding wings 68 and 72 from backward, carrying the forward position,

vthe portion of the bellows-folded side of the blank which they have gripped and forming,

the diamond-shaped creases orsfold-s which are afterwardpasted down and formthe bottom ofthe bag'. As this latter movement takes place, the auxiliary' wing 72 is sepa? rated from its engagement-with the wing 68,

by mea-ns of `a projection 85 pivoted at 86'to the member 69 andheld in the engaging position by a spring 87 which serves to restore said projection against aideiining in a manner tobe described to its normalrposition. As the wings are turned'backagainst the blank l hy the engagement of the' toothed segment same; t e projection' folds of the blank by the cam guides GG as the cyilnder 30 revolves.

The cam guides for operating the folding wings are disposed in fixed relation to thev rotating cylinder 30, on both sides of the saine, and said wings are gradually moved into position as the cylinder rotates. As the section of the bag leaves the point where the fold has been made, the folding wings follow `with it, lying between the folds of the bag side until withdrawn by the cams in the manner noted above; the bag blank being carried forward bythe gripping fingers 51 until passed to the other mechanisms. The folding wings in turningover to'fold a portion yof vthe end ofthe blank toform the bottom of the bag, press the latter against the edge of the defining plate 88, which thereby limits and controls one dimension of the bottom of the bag. This plate, which issecured to a sleeve 89 mounted on a rod l9() carried v by arms 91 journaled on the shaft 6, -is so held by means of 'a torsion spring 92 within the sleeve and surrounding said rod, Aas to have a constant tendency to engage the surfacefof the cylinder 30. It is .held away from the cylinder until such time as it is needed to coact with the folding wings, by

means' of an arm 93 carried by said sleeve and having'a projection 94 to engage a fixed cam carried by the housing for the bearings of the rollers 13 andl. The 'defining plate rests over the blanks, and as .the latter are carried forward on the face of the cylinder 30, it is bodily moved until saidy front edge coincides with a line passing vertically through the center of the shaft 6, when it engages the 'blanks and moves with" them during the folding of the bottom. This movement is accomplished by a cam 96 mounted on the shaft of the feed-roll. 13, one of the arms 91 being pivotally connected at 97 to a yoke-piece 98 embracing said shaft and carrying a pin 99 fitting the groove 100 of Said cam. 'lhe continued movement of the cam 96 returns the arms 91 and the defining plate is retracted for engagement with 'a fresh blank. As the plate is .moved forward preparatory to the folding of the blank to form the bottom of the bag, it passes radually into engagement -with the 94;. carried by the arm 93 riding up. the edge of the cam 95 before the plate ism actual contact with the bag, and when the plate is moved back, said projection rides down the surface of the cam and gradually raises .the forward'edge of the plate. By this means, when the plate reaches the limit of its rearward movement, it has been lifted high enough to clear the cylinder 8O and permit Vthe 'latter to receive the next blank. As Ythe, blanks are carried forward bythe cylinder, being held thereto by the gripping fingers 5 1, aiiatteningplate 101 carried by an arm'102 adiustably secured to a rod 103 mounted in the end of arms 104 which are journaledon spindles 105 and moved by torsion springs 106, en gages the folded bottom portion of the blank, flattening down the folds or creases which have been put into the same, and said blank is then presented to the pasting device. The lingers 51 while gripping a portion of the bag bottom underlie also the anfrular side folds of the bottom and when sa1d fingers are withdrawn after being pushed away from the face of the cylinder by the high side of the cam 50, the tendency to tear the bottom is prevented as said fingers may move inwardly on their pivots, rocking on the pin 51a, a sufficient distance to leave the fold without tearing, the spring 56 serving f to hold said fingers in the outward position imparting but very slight tension thereto. The flattening plate 101 is carried into contact with the bag blank by means of the torsion springs 106 as explained above, and a cam 10T is employed to retract or lift said plate, said cam heilig carried by a shaft 10S and engaging a pm 109 on one of the arms The pasting device comprises a roll 110 having a. horseshoe-shaped engaging snrfare 111, said roll being mounted on the shal't 10S which receives motion from the gear wheel 7 by means of the pinion 11-1. 'lhe surface 111. receives paste from a roll 115 mounted on a shaft 116 receiving mo'- tion from the shaft 10S by means of the pinion 117 and rotating in a paste receptacle 11H. In addition, the shaft 108 carries feed disks 119 mounted on both sides of said pasting device, so that during the pasting operation the bag will be positively fed' forward in proper alinement and confined against displacement. When the folded end ol' the bag reaches a point substantially opposite the horizontal center of the cylinder. the gripping fingers 51 are released,

' such action being accomplished by thelhigh side 65 of the cam 50 which engages the stud 5S) and rocks the arm :34 supporting said fingers, on its pivot, causing the lingers to be thrown inward quickly to the position shown at a', Fig. 4, thereby releasing the end of the bag land permitting its forward end to enter and pass between the guide plates 120 ready to have its end creased in parallel folds, so that the portions of the diamondto forni the Satchel bottoms can be folded over and pastedv down.

In order that the pasting device ma)1 readil)Y engage the bottom of the bag and distribute the paste in a propel' manner over the several portions of the bag bottom whether sin-h portion is of two or more plies,

' l mount the pasting mechanism on a platl'orzn or shelf 125 which isrpivoted to the frame j at the points 126 and normally held so tha, the pasting roll may engage the bottom of the bag, by means of springs 127, connected at one end to the housings of the lbearings of such pasting mechanism and at the opposite end to the supports for the shaft 6. This arrangement permits the pasting roll to yield When the double plies of the bag bottom are engaged and insures an even distribution of the paste upon the parts desired.

In completing the formation of the bottom and the securing of the pasted portions, the bag bottoms are folded over upon themselves and for this purpose they must be creased. Various means for accomplishing this result may be employed, not shown herein, one form of such creasing means comprising two rolls 130 and 131; the roll 130 having a pair of creasing blades 132, and the roll 131 having a pair of recesses 133 in each of which a gripping plate 134 is mounted. The platesl 134 are journaled on shafts 135 carried by disk plates 136 secured to the ends of the roll 131, and have arms 13T and 13S engaged by cams 139 and 140 mounted on the spindle 141 of said roll 131 which serves to move said plates 134 into 'engagement with the portions if the bag which have been pushed into the recesses 133 by the blades 132. This mechanism serves to place the parallel folds or creases in the bag, the first one made being shown at y in the diagram views illustrating the bag and the folds of its bottom. On the continued movement of the bag between said rolls, this creased portion is released and caught between a .small roll 145 and the face of the roll 131, and this action serves to fold over and hold down the first section of the bottom. Immediately following this operation, the second set of crimping means come into contact With the bag and serve to putin the second fold or crease it.: the bottom at the point and lap over the other half which is pressed down by another small roll 146 acting against the surface of the roll 131; the bag having its bottom turned over against the body, and the fold for the final pasting being What is known as a blind fold. The bag is now linished, and passes to any suitable means for conveying it away.

The slit made by the knives carried by the second set of feed rolls provides the projecting portions a clearly illustrated in the diagram views, which cover the central portion of the bottom and serve to finish tln` same.

All of the mechanism just described is carried by the frame 1 and supported by cross-bars mounted `on such frame: such mechanism being disposed wholly within the sides of said frame. t

The cutting means which I nave shown are specifically claimed in an application for patent, filed August 17, 1905, Serial- 1N o,

274,607, and no particular mention of the same is'necessary herein.

As will be readily noted, the machine formingthe subject of my invention comprises but few parts and is simple in its construction, arrangement and inode ot npreration. For every revolution of the Cylindei' 30, three complete bags are formed.

-"lclaim: .1.

l. The combination, in bag forming meehanisni, of tivo sets of feed rolls, cutting means disposed between said feed rolls, a. rotating cylinder carrying the bag blanks, means carried byfsaid cylinder for making the diamond fold to form the bottom of the bag, means for moving such mechanism into and out of the operative position with relation to thecylinder, means for driving said cylinder -at a higher rate of speed than the last pair of feed rolls, and cams carried by said rolls for separating the portion engaging the blanks'when the .latter areA to be means disposed between said rolls, guides extending from such cutting means for the released.

2. The combination, in bag forming meehanism, of two sets of feed rolls, cutting sides of the bellows-folded tube, means ear ried by the guides for opening said bellows i folded sides, and means for keeping said tube in alinement during the opening 'operation.

3. The combination, in bag forming meehanism, of a cylinder carrying the bag blanks, folding mechanism to form the bottom of the bag bodily movable toward and from the blanks, said 'mechanism comprisinga Xed Wing to hold a portion of the blank, a ivin movably mounted to effect the folding o the bottom and an auxiliary Wing actuated by the movable wing and between which and said movable Wing one of the side folds of the blank is confined, a support or carrier for said Wings, means for holding said auxiliary Wing against the movable Wing, means for actuating said movable Wing, and a pivoted Wedging member lying in the path of the 'Wings when moved over to fold the bottom for separating the movable Wing and the auxiliary wing to pra-mit. their Withdrawal .from-'the side folds of the blank.

` 4. The COII1blnatl0n,ii1 inno forming meollanism, of a rotating cylinder for carrying the blanks having apertures cnt in its face,

shoulders formed by said apertures, pivotally mounted gripping fingers carried by said cylinder and projecting through said apertures, means for holding said fingers` against the blanks, and projections eax-med by said fingers and disposed m engagement with the shoulders of the cylinder whereby said fingers are locked against movement While confining the blanks to `the. cylinder.

5. The combination, in bag :Forming meehanisin, of a rotating cylinder, pivotally mounted gripping fingers carried thereby. means for feeding bag blanks to said cyliie der, means for shifting said fingers to engage the underply of the forward end of the blanks, means for forming the diamond-fold in the end of said blanks,said fingers serving to define ythe angular creases at one side of the bottom, means for carrying the blank forward, a pivoted frame carrying said lingers, an arm carried 'by said frame, and an internal earn vfor engaging said arm to displace the gripping fingers and release the bag blank.

6. The combination, in bag forming meehanism, of a cylinder, means for feeding bag blanks thereto, means carried by said cylinder for gripping said blanks, Wings for engaging the side folds at one end ofI the blanks for placing the diamond-fold therein to form the bottom, a fixed cam for n said Wings into the operative position with relation to the blank, one of said Wings being rotatable', a pinion carried by said Wine', a toothed segment for engagement with said pinion to thronT said iving over, means for operating said segment, an auxiliary iving normally in engagementivith the rotatable wing and mounted so as to have rotative movement with and independently of the main rotatable Wing, and means engaged by the rotatable Wing designed to contact With and force said auxiliary Wing away from the said rotatable Wing.

7. The combination, in bag forming mechanism, of feed rolls for the tube, guides adjacent thereto arranged to enter` the bellowsfolded sides of the tubes, saidV guides having thickened portions forming opening means for saidides, and means disposed below said guides for holding the nndeiply of the tubel against the saine and keeping said tube "-in alinenient during the opening operation.

.8. vThe combination, in bag forming mechy anisin, of the feed rolls, cams/carried thereby for eiecting their separation at regular intervals, opening guides for the side folds of the blanks, and tension rolls adapted to hold the lower ply of the sides against sueli opening guides to keep the tube properly aliued.

9. The eonibinatioii,in bag forminginerliauisni, of the feed rolls, means carried thereb for eti'eeting their sparation at regular intervals, opening guides for the sided'oldsI of the blanks, tension rolls adapted to bold the lowlr ply ol the tube side against .seu-b guides to keep the tube properly alined, aud means for releasing said tension rolls.

l1). 'l`be roinbination, in bag Forming mechanism. of a rotating cylinder. gripping lingers carried thereby, the. cylinder being uperlured for the passage ol' the saine, means for feeding blanks to said ingers for engagement by the saine against said cylinder,

a carrier for said ngers, pivots for the iingers, means for rocking said lingers on their pivots, andmeans for rocking said carrier to release the fingers from the blanks.

' 11. The combination; in bag forming mechanism, of a cylinder, a pair of curved gripping fingers carried thereby, said ngers being plvotally mounted alongside of each other and the cylinder being apertured for, the passage of the same, and tension means for holding said ngers with their'. curved ends in an outwardly projecting po-l sitio'n, said means 'permitting contraction ol the projectlng ortlons of said fingers as they are release from the overlying folded l5 l l WILLIAM C. FULLER.

Witnesses:

MURRAY C. BOYER, Jos. H. KLEIN. 

